So, I've been flying the BUFF quite a bit lately, and I love everything about it thus far.  However, I recently noticed that the amber warning light on the right external tank is always on, even with 100% fuel onboard.  EDIT:  The manual says that this light indicates the external tanks being used out of sequence, but then says nothing more about the CORRECT fuel sequence.

In addition, FSX pesters me every few minutes with a "Fuel is critically low in the selected tank" message at the top of the screen.  Is this the case with everyone, or am I the only one with this issue?